谢旭,吴向阳,张志毅,齐维闯,黄诗铭,史春元.焊接工艺对SMA490BW耐候钢接头腐蚀行为的影响[J].表面技术,2018,47(10):256-261. XIE Xu,WU Xiang-yang,ZHANG Zhi-yi,QI Wei-chuang,HUANG Shi-ming,SHI Chun-yuan.Effects of Welding Processes on Corrosion Behavior of SMA490BW Weathering Steel Joints[J].Surface Technology,2018,47(10):256-261 |
焊接工艺对SMA490BW耐候钢接头腐蚀行为的影响 |
Effects of Welding Processes on Corrosion Behavior of SMA490BW Weathering Steel Joints |
投稿时间:2018-01-23 修订日期:2018-10-20 |
DOI:10.16490/j.cnki.issn.1001-3660.2018.10.034 |
中文关键词: SMA490BW耐候钢 手工焊接头 自动焊接头 模拟工业大气 周期浸润腐蚀 |
英文关键词:SMA490BW weathering steel manual welding joint automatic welding joint simulated industrial atmosphere cyclic immersion corrosion |
基金项目: |
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Author | Institution |
XIE Xu | 1. School of Material Science and Engineering, Dalian Jiaotong University, Dalian 116028, China |
WU Xiang-yang | 2. Department of Technology Engineering, CSR Qingdao Sifang Locomotive and Rolling Stock Co. Ltd, Qingdao 266111, China |
ZHANG Zhi-yi | 2. Department of Technology Engineering, CSR Qingdao Sifang Locomotive and Rolling Stock Co. Ltd, Qingdao 266111, China |
QI Wei-chuang | 2. Department of Technology Engineering, CSR Qingdao Sifang Locomotive and Rolling Stock Co. Ltd, Qingdao 266111, China |
HUANG Shi-ming | 1. School of Material Science and Engineering, Dalian Jiaotong University, Dalian 116028, China |
SHI Chun-yuan | 1. School of Material Science and Engineering, Dalian Jiaotong University, Dalian 116028, China |
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中文摘要: |
目的 研究转向架焊接构架用SMA490BW耐候钢及其在不同焊接工艺条件下制得的焊接接头在模拟工业大气环境下的腐蚀行为。方法 采用周浸腐蚀试验方法,利用扫描电镜(SEM)、X射线衍射(XRD)和能谱(EDS)等方法,研究了腐蚀产物的表面形貌、锈层结构及相组成。结果 在模拟工业大气环境条件下,SMA490BW耐候钢母材、自动MAG焊接头、手工MAG焊接头的腐蚀失重率呈先增后减的变化规律,其中自动MAG焊接头腐蚀失重率最小,手工MAG焊接头腐蚀失重率最大,而SMA490BW耐候钢母材居于两者之间。耐候钢母材及其焊接接头腐蚀产物的相组成均为γ-FeOOH、α-FeOOH、Fe2O3和Fe3O4。经过150 h腐蚀后,耐候钢母材及其焊接接头腐蚀产物中Cr、Ni、Cu合金元素含量有所差异,其中自动MAG焊焊缝腐蚀产物中Cr、Ni、Cu合金元素含量最高,分别为1.79%、0.23%、0.17%。Cr、Ni、Cu合金元素将直接对耐候钢母材及其焊接接头耐腐蚀性产生影响。结论 与手工MAG焊接头相比,自动MAG焊接头耐蚀性较高的主要原因是焊缝中主要抑制锈层腐蚀的Cr、Ni、Cu合金元素含量较高。 |
英文摘要: |
The work aim to study corrosion behavior of SMA490BW weathering steels for bogie welded structures and their welding joints fabricated under different welding process conditions in simulated industrial atmospheric environment. In the method of cyclic immersion corrosion test, surface morphology, rust layer structure and phase composition of corrosion products were studied by using scanning electron microscope(SEM), X ray diffraction (XRD) and energy dispersive spectroscopy (EDS). Corrosion weight loss rate of SMA490BW weathering steel base metal, automatic MAG welding joint and manual MAG welding joint firstly increased and then decreased in simulated industrial atmospheric environment. The corrosion weight loss rate of automatic MAG welding joint was the smallest, that of the manual MAG welding joint was the largest, while that of the SMA490BW weather steel base metal fell in between. Phase composition of the weathering steel base metal and its welded joints was all γ-FeOOH, α-FeOOH, Fe2O3 and Fe3O4. After 150 h corrosion, content of Cr, Ni and Cu alloying elements in the corrosion products of the weathering steel base metal and its welding joints were different. The maximum content of Cr, Ni and Cu alloying elements in the corrosion products of automatic MAG welding seams was 1.79% 0.23%, 0.17%, respectively. Cr, Ni and Cu alloying elements would directly affect corrosion resistance of weathering steel base metal and its welding joints. Compared with the manual MAG welding joint, main reason for high corrosion resistance of automatic MAG welding joint is high content of Cr, Ni, Cu alloy elements which mainly suppress corrosion of rust layer in welding seams. |
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